The Mavs control the contractual option, but the decision is Nowitzki’s to make. “I hope so,” Mavs owner Mark Cuban said when asked whether he believes Nowitzki will opt to play next season at age 40. “I think there’s a really good chance he is [coming back], because he wants to break the record for years with one team and be that one guy. Not many people have that opportunity. “He’s still having fun,” Cuban added.